Engine starter



Aug.2 7,1929.' N N 1,726,397

ENGINE STARTER Filed Jan. 27, 1926 2 Sheets-Sheet 1 Aug- 21, 1929. RP. LANSI G 1,126,391

suemm snawa Filed Jan. '27. 1926 #Sheets-Sheet 2 7 f utamflmhm dug,

Patented 27, 1929. v

UNITED STATES 1,726,397 PATENT OFFICE;

RAYIIOND nmmsmc, or xqn'rcnam..m mnsnr, ASSIGHOB T ncmrsn n- 1 cm: 001mm, or arms, new Year, A conrona rrox or maw your.

exam strum Application fled January :1, 192:. 'Serial in. m

' My invention relates to engine starting particularly but not necessarily airplane"engines and the object thereof is to provide a simple, efiicient and reliable apparatus for either manual or power operation or both, and preferably provided with inertia means, such as a flywheel actuated by such power .10 means or manual means for the accumulation and storing of energy which is thereupon utilized by the application thereof to the engine forcranking the same, such apparatus being characterized by the provision-of automatic means, preferably electrically controlled as an incident tothe energizing of the power means, such as an electric motor, for the purpose of automatically establishing driving relationbetween such motor and the starting apparatus including the inertia means when us d. such connecting means being normally inoperative or disconnected whereby the motor is not actuated when the manual means is themeans employed to actuatethe starting apparatus.

In the drawings, Figure 1 is a sectional elevation of a portion of the apparatus embodying my invention including the electric motor, connecting means and inertia means and a part of the starting apparatus proper, the remainder of such apparatus being the same as shownin the lower portion of Fig.

3; Fig. 2 a wiring diagram of the electrical connections and electrical devices employed in connection with the structure of Fig. 1;

Fig. 3 a sectional elevation of a form" of apparatus modified as to the motor and the electrical controlling means but taken on an irregular line in order to show 'the manual means in horizontal section; Fig. 4 a wiring diagram of the connections and electrical devices employed inconnection with the structure. of Fi 3; and Fig. 5 a detail view of a modified orm of construction with respect to the means for actuating the connecting meansbetween the motor and the starting apparatus.

My apparatus comprises a transmission or drive having an element adapted to engage a member of the engine to be started and. power means such as electric motor and manually operated means, and including reduction associated with such-drive I and also y preference an inertia means, such as a flywheel. The power means and the manuafhieans may be combined in the same apparatus and may be used separately or. conjointly if d and moreover the manual means, if desi may be dispensed with whereupon such apparatus would be operated wholly by power means. I prefer the construction shown in Fig. 1, and in describing the structure thereof, it will be understood that the apparatus proper is the same as shown inthelower portion of Fig. 8.

First describing the drive proper, the same is located within a main casing 1 which is suitabl supported as b being detachably connec with the c case 2 of the engine, a small portion of which is illustrated. Within a bushing 3 in the there rotates. a driving barrel 4 and a shell 5 concentrically arranged therewithin and pro viding an annular space between them to receive a yieldable driving connection "which is here in the form of a friction clutch 6.

.This clutch is composed of two sets of plates which are splined respectively to the interior of the barrel and the exterior of the -shell.. The proper pressure for the plates is pmvided by a series of springs 7 located in such annular ace, and such pressure is regulated by the adjustable nut 8 screwing onto the outer end of the shell. The thrust of these springs tends to force the shell outwardly whereby the ring 9 clamps the plates together by forcing them against the ring 10 which bears against the internal flange 11 within the shell. The shell 5 is provided with internal long lead threads 12 on which is threaded a screw shaft 13 constituting the main portion of the driving .member whose other principal por tion is a clutch member 14 adapted to engage 5 a member of the engineto be started, such asthe corresponding clutch element 15 form-. ing a part of or secured toa rotatable portion of the engine, such as the crank shaft 16 thereof. The clutch element 14 is'in the form of a disk having clutch jaws 17 adap ed to engage the complemmitary clutch jays 18 on the engine member and provided with a hub or sleeve portion 19 which has a bearing fit within the shell 5and which 1s splmed onto the outer end portion of the exterior of the screw shaft 13 whereby element 14 and shaft 13 have a'relative longitudinal moveother.

' The outward movement of element 14- is shell 5.

limited by the head of a rod 23 which passes centrally through the driving parts and centrally through the main shaft 24 of the reductiongearing. This-rod'is a manually operated rod terminating in a handle 25 at a point exterior of the apparatus, in the present instance the same being located adjacent the exterior of the casing of the man ually operated means. The inner end ofthe screw shaft is provided'with two nuts 27, the one nearest the end of the screw shaft being a lock nut and the other nut providing an abutment for the outward movement of such shaft against the shoulder 28 within the Next referring to the reduction gearing, the same is contained within the casing l and cover plate 1" by which such gearing is supported and in which it has its bearings. A stationary internal gear 29 is secured to casing l and witlethesame meshes a series of planetary gears 31 which are journaled between two parallel plates 32 and 33. The inner plate 33 is connected with the barrel 4 in suitable. manner as by being splined thereto. -This plate 33 has a hub provided with longitudinal grooves adaptedto receive the projecting pins 38, at the left-hand end of ,shaft 24 (Fig. 3) whereby such shaft and plate are .detachably connected and the shaft is adaptedto drivethe plate and its attached gearing.

The pinions 31 mesh with a central pinion 39 which is here shown as 'a part of the hub 40 of a pear 41 mounted to rotate freely upon sha t' 24 through the bushing 42. -This gear 41 meshes with a pinion 43 which by preference is formed upon the hub 44 of'a bevel-gear 45'-mounted to rotate freely upon shaft 46 throu h the medium ofthe bushing 47'. -This sha 46 has its bearings in the inner walls of the casin 1 and plate 1.

The right-handend o shaft 24 is journaled inbearings 48 'in plate 1 and extends therethrough and to such projecting end a bevel pinion 49 I is secured. This pinion forms a part of the manual means a'ndextends into a .small casing 50 detachably secured, to plate 1 in-suitable manner. In

addition'to pinion 49 a manual means consists of a cranking shaft 52 extendi exteriorly of casing-50 and thereat provilf suit/able ineans as the pins 53 for engagement with an ordinary hand crank. This shaft 52 is j ournaled in bearings 54.within the casing 50 and held in-proper position longitudinals ly by nut 55' and collar 56. The shaft 52 ed with.

- to'casing 1 in suitable manner as by screws 59. The flywheel comprises a rim vhaving the predetermined or desired mass or weight, a web 61 and a hub 62. This hub is drivingly secured asby spliningto a vertical shaft 63 whichis journaled in bearings 64 in the casing 58 and has at its lower end a bevel pinion 63 meshing with gear 45.' The flywheel is held in proper position on shaft 63 by a nut 65 screwing upon' the upper end of such shaft. The upper surfaces of the flywheel is provided with one of the members of the clutch by which drivingrelation is established between the motor and the starting apparatus, in the present instance, specifically between the motor and theflywheel and by preference such clutch member is made as a plate 66 secured to the flywheel web as by rivets 67 and having armature shaft is journaled at its upper end i in a thrust bearing .72 and at its" lower end in. a bearing 73 arranged in'the central bore of an end .plate .or. head 74 of the motor. To this head there is attached the helix 75 is secured to or may be said to form a part of the second member of the clutch, adapted to cooperate with the clutch member 66.

v This helix depends from the head 74-.and

within it is arranged a solenoid plunger 76' 'of ,such shaft. This solenoid plunger is made cup-shaped at its lower end and a light spring 78 is interposed between it and astop nut 79 screwing onto the lower or outer end of the armature shaft. The amount of longitudinal 'movement of the plunger is predetermined, the same being the "distance between suchnut and the bottom of the cup, portion of the plunger.

This spring 78 serves to hold the plunger in normal posiof a solenoid, the plunger portion whereof tion as shown in Fig. 1. I prefer to make this second clutch member in two portions in order to facilitate meshing of'the clutch jaws. -As shown, the second portionof this F and with a switch at S and a is charged by a se arate clutch member comprises sglined to the outer s aped portion of the plunger and held in normal position thereon against a flange 81 on such plunger by a coil spring 82 bearing between such ring and a plate 83 attached to such plunger and held thereon by a looking ring 84. By preference, a retaining shell is, secured to the ring 80. The clutch ring 80 is provided with a jaw 86 complementary of and adapted to engage the jaw 68.

In Fig. 2, there is shown the electrical cona ring 80 which issurface of the cupnectlons and arrangement of the electrical devices according to which the solenoid winding indicated at SOL is in series with the armature, indicated by A which in turn is connected with the field indicated at battery indicated at B, the grounds being indicated by GR. It Wlll be understood that the batteryt generator driven by the engine and in icated at G but not otherwise shown. The construction and arrangement are such that when the switch is pressed by the operator to close the circuit the ampere turns of the solenoid winding are suflicient to bring the center of the solenoid plunger in central position with respect to the solenoid winding by longitudinal move ment of such. plunger upon the extended armature shaft and against the tension of the light spring 78.

Describing a cycle of operation of the apparatus and beginning with the utilization of the electric motor as the source of energy and with the, parts in their normal position shown in Fig. 1 in which the clutch jaws 66 and 86 are disengaged, the motor is energized by the operator by the closing of the switch S whereupon the solenoid will be simultaneously energized and the plunger 76 thereof caused to move longitudinally on the armature shaft to therebybring the clutch jaws into engagement and establish driving relation between the motor and the flywheel. In case of abutting of the clutch jaws, the ring 80 will yield in a longitudinal direction aglainst the tension of the spring 82 and w en register between such jaws results from the rotary movement of the armature shaft, the jaws 86 will be snapped into driving engagement with the jaws 66. The rotation of the motor is consequentl transmitted to the flywheel and the atter is rapidl rotated and when its R. P. M. reaches a pre etermined figure, such as in practice from fifteen thousand to twenty thousand, the current may if desired be switched off from the electric motor, but it will be under stood that the switch is held closed until the flywheel reaches this predetermined R. P. M. When the switch is released and the circuit broken, the motor will be deenergized and .is moved to likewise the solenoid whereupon the clutch jaiws 66 a7nd 86 will be h p unger 6 restored to normal position y the spring '78. Thereu n the rod 23 is manuall moved inwardly, that is to the left in ig. 3 and the screw shaft and element 14 are moved longitudinally and such element thereb advanced and brought into engagement with 50. The engine is thereby (cranked in view of the fact that element 14. is being rotated through the drive by means of the flywheel and such rotation will continue so long as there is suflicient energy left in the flywheel for that purpose. Describing the transmission of torque from shaft 63 through' -the reduction gearing and drive proper, the 'ro-' tation of shaft 63 rotates gears 45 and 41 whereupon pinion 39 is rotated, and consequently the planetary pinions 31. These latter pinions by reason of their meshing with internal ear 29 will cause the entire frame by Whic they are supported consisting of plates 32 and 33 tobe rotated. As plate 33 is drivingly connected to barrel 4, the latter will be rotated and consequently the shell or nut 5 will be rotated through friction clutch 6. Although screw shaft 13 is threaded to the now revolving nut 5, it will not advance longitudinally but will rotate with such nut and consequently element 14 will likewisebe rotated, but when rod 23 the left, as hereinbefore explained, the screw shaft will be moved longitudinally whereupon the clutch elements 14 and 15 will be brought into engagement and the torque or accumulated energy of the flywheel will be transmitted to the engine to crank the same.

When the engine operates on its own power, the excess speed of rotation thereof and element 15 will cause the screw shaft and element 14 to be retracted by screw action between the screw shaft and its nut 5 and thereby to become disengaged from the engine in automatic manner.

Next describing the manual means as the source of energy, an ordinary hand crank is applied to shaft 52 and rotated by the operator until the desired or predetermined R. P. M. of the flywheel is reached/ In this operation, the torque is transmitted from shaft 52 through the pinions 57 and 49 to shaft 24 and thence through the frame of the pinions 31 to gears 40 and 45 and thence to shaft 63 and finally to the flywheel. The clutch jaws 66 and 86 being normally disengaged, the torque of the shaft 52 is not transmitted to the electric motor and the latter will consequently remain idle, thereb eliminating the considerable load thereof: particularly of its brushes which load is considerable owing to the fact that it is multiplied many times through the gearing described. The flywhcel having now been r0- the other clutch element' disengaged and the i tated to the 'a cylinder 87 and within this cylinder'there is arrangeda solenoid plunger 88 mounted for rotary movement therewith and longitudinal movement thereof as by means of the splines 89. Thisplunger is guided upon a central rod 90 extending longitudinally and centrally through the cylinder 87 and secured as by threading to the solid end 91 of the armature. at the upper end of such cylinder 87. The clutch means attached to or forming a part of the plunger are the same as in Fig. 1 and the same reference letters are applied to the corresponding parts shown in Fig. 3. It will be understood that the cylinder 87 has splines extending only part way of its length whereas the plunger has splines extending its full length.

In the construction shown in Fig. 3, a separate coil or winding for the solenoid action is not used, but the solenoid action of the armature windings is taken advantage of and the current through such armature windings gives thesame solenoid action as the current through the solenoid coil of the.

structure of Fig. 1, such action drawing the magnetic center of the plunger 88 into the center of the armature core.

In Fig. 4, I have shown a diagram of the wiring and arrangement of electrical devices employed in connection with the structure of Fig. 3 according to which A indicates the armature, F the fields thereof, S the switch, B the battery. and G thegenerator which is driven by the engine and not otherwise illustrated and which charges the battery. The grounds are conventionally indicated at GR.

In Fig; 5, I have shown a modified form of construction according to which the lonplunger,

- through raised osition by a spring 95.

gitudinally movable element of the clutch is hand operated by being longitudinally shifted upon the armature shaft through the medium of an; actuating rod extending extraneous of the frame of the motor. In this construction, the movable portion of the clutch is the same as in Figs. 1 and 3 with the exception that the main portion or body thereof indicated at 92 is not asolenoid but is actuated in its movements by means of a shifter rod 93 which has a yoke portion cooperating with the circumferential groove 94 in the upper end of such body portion of the clutch. This rod extends the. frame 70 of the motor and to the exterior thereof and is normally held in The spring presse detent 96 normally engages the lowto be started. a

,ermostnotch 97 in the rod 93 to hold the same raised, but is adapted to also engage the notch 98 to hold'suchrod in its lower position which is the position of engagement of the clutch jaws .66 and 86. In operation, the clutch is operated to cause engagement between the clutch jaws by thehand operation of the rod 93 and the motor is energized to rapidly rotate the flywheel and when the desired R. P. M. is attained the apparatus is manipulated in the manner hereinbefore explained. I

I claim:

1. An engine starter including, in a selfcontained apparatus, a driving member adapted to crank a member of the engine high-speed rotatable inertia device operatively connected therewith, an electric motor 1 having an armature shaft,

and means for connecting it withthe inertia having an armature shaft alined with the axis of said inertia device, and means for connecting said armature shaft with the inertia device anddisconnecting it therefrom comprising a clutch. member mounted concentrically of and to rotatewith said armature shaft and to. move longitudinally there.- of into engagement with the inertia device, and electrically operated means for controlling said longitudinal movement of said clutch member.

3. An engine starter including, inr a self contained apparatus, a driving member adapted to crank a member of the engine to be started, a rotatable inertia device operatively connected therewith, an electric motor having an armature shaft alined with the axis'of said inertia device, and .means for connecting it with the inertiadevice and disconnecting it therefrom comprising a clutch member mounted concentrically of and-to be rotatedby said armature shaft and to move longitudinally thereupon into engagement with the inertia device, and a solenoid between said motor and said clutch member for controlling said longitudinal movement of .the clutch member.

4. An engine starter including, ina self-' contained apparatus, a driving member adapted to crank a member of the engine to be started, reduction gearing therefor, a high-speed rotatable inertia device operatively connected therewith, an electric motor means having an armature sh and means for connecting it with the inertia device and disconnecting it therefrom comprising a clutch member normally in a disengaged position with respect to said inertia device but mounted upon the armature shaft to be rotated thereby and to move longitudinally thereupon into engagement with the inertia device, and means for controlling the longitudinal movement of said clutchmember.

5. An engine starter including, in a selfcontained apparatus, a driving adapted to crank a member of the engine to be started, a rotatable inertia device operatively connected therewith, an electric motor with the axis of said inertia device, and means for directly connecting it with the inertia device and disconnecting it therefrom comprising a clutch member normally held in a disengaged position wit-h respect to the inertia device with a, yielding pressure but mounted on the armature shaft to be driven thereby and to move longitudinally into engagement with such inertia device, and for controllin V the longitudinal movement of said clutch member. 6. An engine starter including, in a selfcontained apparatus, a driving member adapted'to crank a member of the engine to be started, a rotatable inertia device operativcly connected therewith, an electric motor having an armature shaft, and means for connecting it with the inertia device and disconnecting it therefrom comprising a clutch member consisting of two parts, a body member and clutch member proper, which are concentric and have a relative longitudinal movement, said body member being rotated by said armature shaft and to slide thereupon to bring said clutch member proper into engagement with the inertia device, and means for controlling the longitudinal movement of'said clutch member.

7 An engine/ starter including, in a selfcontained apparatus, a driving member adapted to crank a member of the engine to be started, a rotatable inertia device operatively connected therewith, an electric motor aving an armature shaft, and means for connecting it with the inertia device and dis connecting it therefrom comprising a clutch member consisting of two parts, a bod member and clutch member proper, which are concentric and have a dinal movement, said body member being mounted to be rotatedby said armature shaft and to slide thereupon to bring said clutch member proper into engagement with the inertia device, yieldable means cooperating with said parts of the clutch to hold them in a normal relative position, and means for controlling the longitudinal movement of said clutch member.

having an armature shaft alined' relative longitu-.

, -8. An engine starter including, in a selfcontained apparatus, a driving member adapted to crank a member of the engine to be Started, a rotatable inertia device operatively lmected therewith and ha clutch jaw provision, an electric motor having an armature and means for conof two parts, a body member and jaw clutch member proper, which are concentric and have a relative longitudinal movement, said body member being mounted to be rotated by said armature shaft and to slide thereupon to br' said clutch member proper into engagement with the inertia device, yieldable means cooperating with said parts of the clutch to hold them in a normal relative position, yieldable means for holding the clutch member in normal position longitudinally on the armature shaft, and means for controlling the longitudinal movement of said clutc member.

- 9. An engine starter including, in'a selfcontained apparatus, a driving member adapted to crank be started, a rotatable inertia device operatively connected therewith, an electric motor having an armature shaft connecting it with the inerti device and disconnecting it therefrom comprising a clutch member consistin of two parts, a body member and clutc member proper, which are concentric and dinal movement, said body member being mounted to be rotated by said armature shaft and to slide thereupon to bring said clutch member proper into engagement with the inertia device, yieldable means for holding the clutch member in normal position longitudinally on the armature shaft, and means for controlling the longitudinal movement of said clutch member.

10. An engine starter including in a selfcontained apparatus, a driving member adapted to crank a member of the engine to be started, a rotatable inertia device opera,- tively connected therewith and having a shaft, an electric motor having an armature shaft alined with and beyond said shaft of the inertia device, and means for connecting said armature shaft with the inertia device and disconnecting it therefrom comprising a clutch member consisting of two parts, a body member and clutch member proper, which are concentric and have a relative lOIlgltlldinal movement, said body member bein splined to said armature shaft to slide thereupon and bring into en agement with the inertia device, and means or controlling the longitudinal movement of said clutch member;

11. An engine starter including, in a selfcontained apparatus, a driving member have a relative longitusaid clutch member proper gso a member of the engine to and means for adapted to crank a member of the engine to be started, a rotatable inertia device operatively connected therewith, an electric mo- F gagement with the inertia device.

12. An engine starter including, in a selfcontained apparatus, a driving member adapted to crank a member of the engine to be started, a rotatable inertia device operatively connected therewith, an electric motor having an armature shaft, and means for connecting it with the inertia device and disconnecting it therefrom comprisinga clutch member mounted to be rotated by said armature shaft and to move longitudinally thereupon into engagement with the inertia device, said clutch member constituting a solenoid plunger, and a solenoid helix separate from the vmotor windings and ar ranged between the motor and said inertia device, and having solenoid action on such plunger to move such clutch member longitudinally into engagementwith the inertia device whenever the motor and solenoid are energized.

13. An engine starter including, in a selfcontained apparatus, a driving member adapted to crank a member of the engine to be started, a rotatable inertia device 0 eratively connected therewith, an electric motor having an armature shaft, and means for connecting it with the inertia device and disconnecting it therefrom comprising a clutch member consisting of two parts, a bod member and clutch member proper, whic are concentric and have a relative longitudinal movement, said body member being mounted to be rotated. by said armature shaft and to slide thereupon into engagement with the inertia device, said body member having a portion acting as a solenoid plunger and an end portion on which the clutch member proper is mounted, and a solenoid helix which with the plunger forms a solenoid that acts to move the clutch member into engagement with the inertia device.

14. An engine starter including, ina selfcontained apparatus, a driving member dapted to crank a memberof the'engine to b started, a rotatable inertia device operati ely connected therewith, an electric moto having an armature shaft, and means for co ecting it with the inertia device and disconnecting it therefrom comprising a clutch member mounted on the armature shaft to S r be rotated thereby and to move longitudinally outwardly thereupon into engagement with the inertia device, a stop on the shaft to limit the outward longitudinal movement thereon of such clutch member, and means for controlling the longitudinal movement of said clutch member.

15. An engine starter including, in a selfcontained apparatus, a driving member, adapted to crank a member of the engine to be started, a rotatable inertia device operatively connected therewith, an electric motor having an armature shaft, and means for connecting it with the inertia device and disconnecting it therefrom comprising a clutch member mounted on the armature shaft to be rotated thereby and to move longitudinally outwardly thereupon into engagement with ,the inertia device, a stop on the shaft to limit the outward longitudinal'movement thereon of such clutch member, a-spring between said stopand clutch member to hold the latter in a normal position longitudinalv ly on the armature shaft, and means for causing longitudinal movement of such clutch member into engagement with the inertia device.

16. An engine starter including, in a self- 1 contained apparatus, a driving member adapted to crank a member of the engine to, a5 be started, actuating means therefor, an electric motor having an armature shaft, and means for connecting it with said actuating means and disconnecting it therefrom comprising a clutch member mounted to be ro- 1C 'tated by said armature shaft and to move longitudinally thereupon into engagement with the actuating means, and means for controlling the longitudinal movement of said clutch member.

17. An engine starter including, in a selfcontained apparatus, a driving member adapted to crank a member of the engine to be started, actuating means therefor including reduction gearing operatively connected 11 at its low-speed end with said driving memher, an electric motor having an armature shaft, and means for connecting it with and disconnecting it from the high-speed. end of said reduction gearing comprising a clutch 1 member mounted to be rotated by said armature shaft and to move longitudinally thereupon into engagement with the actuating means, and means for controlling said longitudinal movement of said clutch member. 1

18. An engine starter including, in a selfcontained apparatus, a driving member adapted to crank a member of the engine to be started, actuating means therefor, an electric motor having an armature shaft, 1 and means for connecting it with said actuating means and disconnecting it therefrom comprising a clutch member mounted to be rotated by said armature shaft and to move longitudinally outwardly thereupon into en- 1 gagement with the actuating means, and electrically operated means for controlling said longitudinal movement of said clutch member consisting of a solenoid between the motor and the outer end of said clutch member.

19. A self-contained engine-starter apparatus including a driving member shiftable to engage and rotatable to crank a member of the engine to be started, actuating means for said driving member including reduction gearing operatively associated at its low-speed end with said driving member, an inertia device having a shaft operatively associated with the high-speed end of said reduction gearin ,1 an electric motor having an armature shaft coaxial with and beyond the shaft of said inertia device, means for connecting said armature shaft with said inertia device and disconnecting it therefrom comprising a clutch member rotatable with said armature shaft and movable longitudinally with respect thereto into direct engagement with the inertia device for equal speed rotation therewith, and means for controlling the longitudinal movement of said clutch member. 20. A self-contained engine starter apparatus including a driving member adapted for movement to engage and'crank a member of the engine to be started, a rotatable inertia devicehaving a shaft operatively connected with said drivin member said inertia device including a ywheel having an axial recess concentric with its shaft, an

I electric motor having an armature shaft alined with the shaft of said inertia device, means for connecting said armature shaft with said flywheel and disconnecting it therefrom including a clutch member arranged within said recess of the flywheel and mounted concentrically of and to rotate with said armature shaft and to move longitudinally thereof into engagement with said flywheel, and means for controlling. the longitudinal movement of said clutch member.

21. A self-contained engine-starter apparatus including a driving member adapted for movement to engage and crank a member of the engine to be started, a rotatable inertia device having a shaft operatively connected with said driving member said inertia device including a flywheel having an axial recess concentric with its shaft and jaw clutch provision within said recess, an electric motor havin an armature shaft alined with said flyw eel shaft, means for connecting said armature shaft with the flywheel and disconnecting it therefrom comprising a clutch member consisting of two parts, a body member and a jaw clutch'member, which are concentric and have a relative yielding longitudinal movement, saidbody member being mounted to be rotated by said armature shaft and to move lon itudinally relativethereto to bring said jaw c utch member intoengagement with the jaw provision of said flywheel, and means for controlling the longitudinalmovementofsaidclutchmember.

In testimony whereof, I have subscribed my name.

RAYMOND P. LANSING. 

